Enter these color codes in the "color" settings of your emulator of choice.

Background
White	232	240	232
Green	48	160	112
Blue	0	80	168
Black	0	0	0

Sprite
Pink	248	200	176
Red	248	0	0
Grey	192	192	192
Black	0	0	0

Once you get to the final section of the game, enter these colors for the best effect:

Background
Light Brown	200	168	136
Red Brown	160	88	88
Dark Blue	0	64	128
Black		0	0	0

Sprite
Pink	248	200	176
Red	248	0	0
Grey	192	192	192
Black	0	0	0